tifm: simplify bus match and uevent handlers

Remove code duplicating the kernel functionality and clean up data
structures involved in driver matching.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

4 files changed, 53 insertions, 40 deletions

diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index d6652b3301dc..fd7b8dadc821 100644
--- a/drivers/misc/tifm_7xx1.c
+++ b/drivers/misc/tifm_7xx1.c
@@ -73,7 +73,7 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
         return IRQ_HANDLED;
 }
 
-static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
+static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
                                                  int is_x2)
 {
         unsigned int s_state;
@@ -90,7 +90,7 @@ static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
 
         s_state = readl(sock_addr + SOCK_PRESENT_STATE);
         if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
-                return FM_NULL;
+                return 0;
 
         if (is_x2) {
                 writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
@@ -129,7 +129,7 @@ static int tifm_7xx1_switch_media(void *data)
 {
         struct tifm_adapter *fm = data;
         unsigned long flags;
-        tifm_media_id media_id;
+        unsigned char media_id;
         char *card_name = "xx";
         int cnt, rc;
         struct tifm_dev *sock;
@@ -184,7 +184,7 @@ static int tifm_7xx1_switch_media(void *data)
                                 if (sock) {
                                         sock->addr = tifm_7xx1_sock_addr(fm->addr,
                                                                          cnt);
-                                        sock->media_id = media_id;
+                                        sock->type = media_id;
                                         sock->socket_id = cnt;
                                         switch (media_id) {
                                         case 1:
@@ -266,7 +266,7 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
         struct tifm_adapter *fm = pci_get_drvdata(dev);
         int cnt, rc;
         unsigned long flags;
-        tifm_media_id new_ids[fm->num_sockets];
+        unsigned char new_ids[fm->num_sockets];
 
         pci_set_power_state(dev, PCI_D0);
         pci_restore_state(dev);
@@ -285,10 +285,10 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
         fm->socket_change_set = 0;
         for (cnt = 0; cnt < fm->num_sockets; cnt++) {
                 if (fm->sockets[cnt]) {
-                        if (fm->sockets[cnt]->media_id == new_ids[cnt])
+                        if (fm->sockets[cnt]->type == new_ids[cnt])
                                 fm->socket_change_set |= 1 << cnt;
 
-                        fm->sockets[cnt]->media_id = new_ids[cnt];
+                        fm->sockets[cnt]->type = new_ids[cnt];
                 }
         }
 
diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c
index dcff45a19bcb..6b2c447dc8ee 100644
--- a/drivers/misc/tifm_core.c
+++ b/drivers/misc/tifm_core.c
@@ -19,42 +19,53 @@
 static DEFINE_IDR(tifm_adapter_idr);
 static DEFINE_SPINLOCK(tifm_adapter_lock);
 
-static tifm_media_id *tifm_device_match(tifm_media_id *ids,
-                        struct tifm_dev *dev)
+static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
 {
-        while (*ids) {
-                if (dev->media_id == *ids)
-                        return ids;
-                ids++;
-        }
-        return NULL;
+        const char *card_type_name[3][3] = {
+                { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
+                { "XD", "MS", "SD"},
+                { "xd", "ms", "sd"}
+        };
+
+        if (nt > 2 || type < 1 || type > 3)
+                return NULL;
+        return card_type_name[nt][type - 1];
 }
 
-static int tifm_match(struct device *dev, struct device_driver *drv)
+static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
 {
-        struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
-        struct tifm_driver *fm_drv;
-
-        fm_drv = container_of(drv, struct tifm_driver, driver);
-        if (!fm_drv->id_table)
-                return -EINVAL;
-        if (tifm_device_match(fm_drv->id_table, fm_dev))
+        if (sock->type == id->type)
                 return 1;
-        return -ENODEV;
+        return 0;
+}
+
+static int tifm_bus_match(struct device *dev, struct device_driver *drv)
+{
+        struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
+        struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
+                                                  driver);
+        struct tifm_device_id *ids = fm_drv->id_table;
+
+        if (ids) {
+                while (ids->type) {
+                        if (tifm_dev_match(sock, ids))
+                                return 1;
+                        ++ids;
+                }
+        }
+        return 0;
 }
 
 static int tifm_uevent(struct device *dev, char **envp, int num_envp,
                        char *buffer, int buffer_size)
 {
-        struct tifm_dev *fm_dev;
+        struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
         int i = 0;
         int length = 0;
-        const char *card_type_name[] = {"INV", "SM", "MS", "SD"};
 
-        if (!dev || !(fm_dev = container_of(dev, struct tifm_dev, dev)))
-                return -ENODEV;
         if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
-                        "TIFM_CARD_TYPE=%s", card_type_name[fm_dev->media_id]))
+                           "TIFM_CARD_TYPE=%s",
+                           tifm_media_type_name(sock->type, 1)))
                 return -ENOMEM;
 
         return 0;
@@ -132,7 +143,7 @@ static int tifm_device_resume(struct device *dev)
 
 static struct bus_type tifm_bus_type = {
         .name    = "tifm",
-        .match   = tifm_match,
+        .match   = tifm_bus_match,
         .uevent  = tifm_uevent,
         .probe   = tifm_device_probe,
         .remove  = tifm_device_remove,
diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c
index 8905b129e4e1..4388ee9062a0 100644
--- a/drivers/mmc/tifm_sd.c
+++ b/drivers/mmc/tifm_sd.c
@@ -948,7 +948,7 @@ static int tifm_sd_resume(struct tifm_dev *sock)
         struct mmc_host *mmc = tifm_get_drvdata(sock);
         struct tifm_sd *host = mmc_priv(mmc);
 
-        if (sock->media_id != FM_SD
+        if (sock->type != TIFM_TYPE_SD
             || tifm_sd_initialize_host(host)) {
                 tifm_eject(sock);
                 return 0;
@@ -964,8 +964,8 @@ static int tifm_sd_resume(struct tifm_dev *sock)
 
 #endif /* CONFIG_PM */
 
-static tifm_media_id tifm_sd_id_tbl[] = {
-        FM_SD, 0
+static struct tifm_device_id tifm_sd_id_tbl[] = {
+        { TIFM_TYPE_SD }, { }
 };
 
 static struct tifm_driver tifm_sd_driver = {
diff --git a/include/linux/tifm.h b/include/linux/tifm.h
index ee1056396b95..57b2653494cf 100644
--- a/include/linux/tifm.h
+++ b/include/linux/tifm.h
@@ -74,13 +74,19 @@ enum {
 #define TIFM_DMA_TX               0x00008000 /* Meaning of this constant is unverified */
 #define TIFM_DMA_EN               0x00000001 /* Meaning of this constant is unverified */
 
-typedef enum {FM_NULL = 0, FM_XD = 0x01, FM_MS = 0x02, FM_SD = 0x03} tifm_media_id;
+#define TIFM_TYPE_XD 1
+#define TIFM_TYPE_MS 2
+#define TIFM_TYPE_SD 3
+
+struct tifm_device_id {
+        unsigned char type;
+};
 
 struct tifm_driver;
 struct tifm_dev {
         char __iomem            *addr;
         spinlock_t              lock;
-        tifm_media_id           media_id;
+        unsigned char           type;
         unsigned int            socket_id;
 
         void          (*card_event)(struct tifm_dev *sock);
@@ -90,7 +96,7 @@ struct tifm_dev {
 };
 
 struct tifm_driver {
-        tifm_media_id        *id_table;
+        struct tifm_device_id *id_table;
         int                  (*probe)(struct tifm_dev *dev);
         void                 (*remove)(struct tifm_dev *dev);
         int                  (*suspend)(struct tifm_dev *dev,
@@ -141,8 +147,4 @@ static inline void tifm_set_drvdata(struct tifm_dev *dev, void *data)
         dev_set_drvdata(&dev->dev, data);
 }
 
-struct tifm_device_id {
-        tifm_media_id media_id;
-};
-
 #endif